.menu {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    transition: transform 0.4s ease, opacity 0.4s ease;
    width: 95%;
    max-width: 390px;
    margin-bottom: 20px;
    height: 55px;

    background: rgba(255, 255, 255, 0.6); 
    backdrop-filter: blur(5px) saturate(350%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);

    border-left: 1px solid rgba(255, 255, 255, 0.25);
    border-right: 1px solid rgba(255, 255, 255, 0.25);

    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 2000;
    border-radius: 27px;

    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.menu button {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu button img {
    width: 25px;
    height: 25px;
    opacity: 0.7;
    transition: opacity 0.2s ease, transform 0.12s ease;
}

.menu button.active img,
.menu button:hover img {
  opacity: 1;
  transform: scale(1.08);
  filter: invert(39%) sepia(85%) saturate(3438%) hue-rotate(340deg) brightness(98%) contrast(101%);
}



.menu button[data-screen="feed"] {
  background-color: #EB4C37;
  width: 56px;
  height: 50px;
  padding: 12px;
  border-radius: 40%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 2100;
  transition: transform 180ms cubic-bezier(.2,.9,.2,1), box-shadow 180ms ease;
  box-shadow: 0 8px 22px rgba(235,76,55,0.18);
}

.menu button[data-screen="feed"] img {
  width: 22px;
  height: 22px;
  opacity: 1;
  transition: filter 120ms ease, transform 120ms ease;
}

.menu button[data-screen="feed"]:hover,
.menu button[data-screen="feed"]:focus-visible,
.menu button[data-screen="feed"]:active {
  transform: scale(1.08);
  box-shadow: 0 14px 30px rgba(235,76,55,0.20);
}

.menu button[data-screen="feed"] img,
.menu button[data-screen="feed"]:hover img {
  filter: sepia(0%) saturate(0%) brightness(100%) contrast(100%);
  opacity: 1;
}

@media (max-width: 420px) {
  .menu button[data-screen="feed"] {
    width: 52px;
    height: 52px;
    padding: 10px;
    transform: translateY(-4px);
  }
}